Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice
Effect of Herbicide Dose and Water Management on Weed Control Efficiency and Yield Performance of Boro Rice
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除草剂剂量和水分管理对Boro稻杂草防除效率和产量的影响
DOI：
10.3329/jsf.v12i2.27737
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
G. Rahman
中科院分区：
文献类型：
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作者：
Md Ahmed;Md Bari;M. Haque;G. Rahman
2011年11月至2012年5月，在加济普尔萨尔纳邦班班杜谢赫·穆吉布·拉赫曼农业大学（BSMRAU）的实验农场进行了一项试验，以确定在连续淹水和田间容量两种水管理制度下，按推荐剂量的75%、100%、125%、150%、175%和200%施用出苗前除草剂吡草胺对水稻杂草抑制和产量表现的影响。BRRIdhan28。同时进行无杂草处理和对照（未除草）处理比较。试验采用裂区设计，3个重复。遵循移栽水稻的标准管理规范。发现连续淹水防治杂草的效果优于田间放水。60 DAT时，在连续淹水条件下，使用推荐用量125%的敌敌草胺处理的杂草防治效率最高，为65.75%，在田间容量条件下，使用推荐用量75%的敌敌草胺处理的杂草防治效率最低，为54.76%。连续淹水导致分蘖数量超过田间容量，除草剂用量达到推荐用量的125%，可提高水稻分蘖率。在75DAT时，在良好的水管理（W1T3）条件下，施施125%培雷草胺的地块分蘖数最高（17.53 hill -1），在田间容量条件下施施200%培雷草胺的W2T6地块分蘖数最低（11.10 hill -1）。W1T3处理的分蘖死亡率最高（27.90%），W2T5处理的分蘖死亡率最低（8.06%）。在连续淹水条件下，按推荐剂量施用吡草胺可获得最高的作物干物质产量（1144.60g m -2），从而获得最高的粮食产量6.31 t hm2 -1，其次是在相同水分管理条件下，按推荐剂量125%施用吡草胺，产量5.95 t hm2 -1，收获指数最高，为0.58。结果表明，在适宜的水分管理条件下，推荐剂量的吡草胺可作为水稻移栽杂草管理的可行选择，既能有效控制杂草，又能获得满意的产量。科学基金学报2014；12(2):39-46 DOI: http://dx.doi.org/10.3329/jsf.v12i2.27737
An experiment was conducted at the Experimental Farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during November 2011 to May 2012 to determine the effect of pre-emergence herbicide Pretilachlor @ 75%, 100%, 125%, 150%, 175% and 200% of the recommended dose under two water management regime i.e. continuous flooding and field capacity on weed suppression and yield performance of Boro rice cv. BRRIdhan28. One weed free and one control (unweeded) treatment were also imposed for treatment comparison. The experiment was laid down in Split Plot design with three replications. Standard management practices for transplanted rice were followed. Continuous flooding was found to contribute better weed control efficiency than field capacity. At 60 DAT, the highest weed control efficiency of 65.75% was found in the treatment receiving Pretilachlor @ 125% of the recommended dose under continuous flooding and the least (54.76%) was found in the treatment receiving 75% of the recommended dose under field capacity. Continuous flooding contributed to more tillers than field capacity, and herbicide up to 125% of the recommended dose enhanced tillering in rice. At 75DAT the highest number of tillers (17.53 hill -1 ) were found in the plots receiving Pretilachlor @ 125% of the recommended dose under good water management (W1T3), while the lowest (11.10 hill -1 ) was recorded in W2T6 treatment receiving Pretilachlor @ 200% of the recommended dose under field capacity. The highest tiller mortality (27.90%) was observed in W1T3 treatment, whereas the least (8.06%) was observed in W2T5 treatment receiving the same herbicide @175% of the recommended dose under field capacity. Application of Pretilachlor at recommended dose under continuous flooding contributed to the highest crop dry matter production (1144.60g m -2 ) thus leading to the highest grain yield of 6.31 t ha -1 being followed by the treatment receiving Pretilachlor @ 125% of the recommended dose under same water management yielding 5.95 t ha -1 along with the highest harvest index of 0.58. Results revealed that Pretilachlor at recommended dose might be considered as viable option for weed management in transplanted Boro rice cultivation for effective weed management and satisfactory grain yield provided that appropriate water management is adopted. Journal of Science Foundation 2014;12(2):39-46 DOI: http://dx.doi.org/10.3329/jsf.v12i2.27737